Ramp and soak profile PID temperature controller

Below is an example of an ordering code and break down of each code
MPU90-16B-61213A
MPU90: Main model number
16B: 48mm*96mm with bar graphic display
6: TC/RTD input, with external switch to run stop the controller
1: Relay output as the main control output
2: 2 alarms, both alarm as Normal open relay
1: 1 auxiliary output (Relay, NO+NC), this output can be configured as cooling control or another alarm output
3:With Modbus RS-485 communication
A:100-240Vac source

Click on below link to download documents

PU90 Series Catalog
PU90 Series User Manual
PU90 Modbus registers table

Here is an example of how you can program the PU90 ramp and soak controller from your PC by using our free software, hardware needed as below

1)PU90 with RS-485 feature
2)USB to RS-485 adaptor
3)A personal computer(PC)

The curve we are going to cover today has a trajectory as below

Step 1) Curve starts at 100 degree, and takes 60 minutes to heat the system up to 400 degree
Step 2) Temperature of the system stays at 400 for 60 minutes
Step 3) Temperature drops from 400 to 250 within 120 minutes
Step 4) Temperature goes up again from 250 to 300 within 50 minutes
Step 5) Temperature stays at 300 for 180 minutes
Step 6) Temperature drops from 300 to 100 within 200 minutes
Step 7) Temperature stays at 100 for 70 minutes
Step 8) Program terminated.

Here is an video tutorial on how you can run the auto-tuning on the this PU90 ramp and soak controller, the auto-tuning process is very important if you want to acheieve an accurate control result, therefore auto-tuning is esstential for a system just been installed on site. this video demostrate on how to engage the auto-tuning, how to choose correct SV for auto-tuning, check the description section of this video for detailed information

Ramp Soak Controllers. This type of controllers changes the setpoint according to the preset program pattern. The program consists of raising/reducing the setpoint (ramp control) and keeping the setpoint at the preset level for a preset period (soak control)

This is a video tutorial on how you can run a specific profile on PU90 ramp and soak profile PID controller 1) There is a simple heating system in the video consists of solid state relay, a light bulb and temperature controller as well as a PT100 temperature sensor. 2)The program executed in the video is a 6 steps program, starts from 0 degree to 30 degree within 5 seconds, step 2 would be hold the temperature at 30 degree for 3 minutes, step 3 bring the temperature from 30 degree to 50 degree within 5 minutes, Step 5, hold the temperature at 50 degree for 3 minutes, Step 6, increase the temperature from 50 degree to 80 degree within 5 minutes and then program stop right there. 3)You can see over the course of the entire program, the temperature and time are changing as per profile pre-programmed. This item is perfect for kiln, oven, furnace, and all kinds of devices that require precise temperature and time control .

1. What is a ramp and soak controller ?
   A ramp and soak controller is a device that controls the setpoint of an oven by gradually increasing the setpoint at a predefined rate (ramping) and then holding it at that value for a specified duration (soaking), essentially creating a controlled heating or cooling profile with a gradual transition and a period of constant temperature maintenance; commonly used in applications like ovens and kilns where precise temperature control with controlled heating/cooling cycles is needed.
2. Key points about ramp and soak controllers
   Function:They manage the setpoint of a process by changing it over time according to a pre-programmed pattern, including both ramping up/down and holding at a specific temperature for a set duration.
3. Components
   Ramp: The phase where the setpoint gradually increases or decreases at a controlled rate.
   Soak: The phase where the setpoint is held constant for a defined period.
4. Benefits
   Preventing thermal shock: By gradually changing temperature, it can reduce the risk of damage from rapid temperature fluctuations.Even heating/cooling: Ensures consistent processing throughout a material by providing controlled heating and cooling stages.
5. Applications
    Industrial ovens,Kilns, Refractory curing, high temperature furnace, labotary furnace, Heat treating processes
6. Can you give me a real-world example of a process for a ramp and soak controller can work ?
   Ramp and soak controller can be used in application such as annealing metals, curing composites, baking ceramics, testing environmental chambers, growing crystals etc.
7. What is the difference between ramp and soak controller and regular PID controller
   Regular PID controller hold the temperature at set point and if nobody changes the set point, it has one fixed setting value at any given time, but ramp and soak controller has a lot of setting point ,and it changes over time, and the ramp up speed and cooling down speed is controllable
8. How many setpoints (or segments) can I program?
   MPU90 has maximum 30 segments, for multiple profiles, the solution would be use the controller together with human machine interface
9. What type of inputs does it accept ？
   This controller is a true universal input controller, works with all kinds of thermocouple and RTD inputs as well as analong inputs
10. What kind of outputs does it have to control my equipment ?
    Output can be Relay, SSR Drive, 4-20mA, 0-10Vdc, Traic, single phase phase firing control
11. What is the control resolution and accuracy?
    ±0.25% of reading ±1°C
12. What's the maximum temperature range it can handle ?
    The maximum temperature range depends on the sensor you are using, the maximum temperature your sensor can handle is the miaxmum tempreature our controller can handle, for example, if you are using a Wre5-WRe26 sensor, the maximum temperature is 2300 degree celcuis
13. Do I need separate software, or can I program it on the front panel?
    You can program it on the front panel, of you can program it on the PC(PC software is available from us), or you can program it from HMI(Human machine interface)
14. Does it have communication options?
    Yes, Modbus RS-485 is an option for communication, Modbus TCP/IP also available on request.
15. Can I program events/auxiliary outputs at specific steps ?
    Yes, you can program events of auxiliary outputs at sepcfic steps/segment, by doing this, you can either run a fan or trigger an alarm at the end of the program
16. What happens if there's a power failure ? Does it resume the program?
    In case of power faliure, the program can be resumed or the controller goes back to starting point, it's all programmable
17. Does it have built-in ramp-to-setpoint or 'soak start' functions?
    Yes, this controller has a built-in ramp to setpoint function, but it only works for the first segment. this is very useful at the begining of the profile or in the event of a power failure.
18. How clear is the display? Can I see the program graph, current setpoint, and process value at the same time?
    It's not possible to see the program graph, but it is possible to see the setpoint, current segment which is running on the controller, process value and time left with the current segment
19. What kind of warranty and technical support do you offer?
    We offer 3 years warranty for this Kiln controller controller
20. What are the delivery times ?
    Typical lead time is 7 working days after order confirmation